Steam-boiler.



No. 709,032'. Patented Sept. i6, |902.

C. LSN.

STEAM BOILER.

` (Application med Marp2e; 1902.) (No Modell.)

(lll) vweno/c @mmm @son UNITED STATEs PATENT OFFICE.

CHARLES OLSON, OF GRAND RAPIDS, MICHIGAN.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 709,032, datedSeptember 16,A 1902.

Application filed March 26, 1902. Serial No. 100,041. (No model.)

To all roh/rmt it may concern:

Be it known that I, CHARLES OLSON, a citizen of the United States,residing at Grand Rapids, in the county of Kent and State of Michigan,have invented certain new and useful Improvements in Steam-Boilers; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in steam-boilers, and moreespecially to small boilers adapted to be taken apart for cleaning andrepairing; and its object is to provide improved means for detachablysecuring the parts in place and also improved means for packing thejoint between the shell andV heads and to provide the device withcertain new and useful features hereinafter more fully described, andparticularly pointed out in the claims, reference being had to theaccompanying drawings, in which- Figure l is a side elevation of aboilerembodying my invention; Fig. 2, a plan view of the same; and Fig.3, an enlarged detail shown in vertical section, showing theconstruction of the same. t

A represents the shell, which consists of a plain tube externallythreaded' at the ends.

B B are annular caps screw-threaded to iit the threads of the shell anddetachably secured to the shell thereby. and also having a large centralopening to expose the ends of the flues.

C represents set-screws in the caps arranged at regular intervals andextending inward therefrom to engage a ring G, preferably of cast-ironor steel, and adapted to engage a gasket F, of suitable material,preferably soft copper. i

D D are boiler-heads of such diameter that they will pass freely withinthe shell A and are connected by the flues E E', secured thereto at eachend in the usual way. The outer tubes 4 E' however, are arran ed in acircle e uidistant from theperipheries of the heads to evenly supportthe same all around against the pressure of the set-screw O. The ring Gis adapted to slightly yield vertically under the pressure of therespective screws C, whereby any leak at any particular point may becured by tightening the screws near the same,` and at the same time saidring is stiff enough to properly press the gasket against the head andshell between the screws. By slacking oif the screws O one or both ofthe caps may be detached from the shell and the heads and tubes removedfor the purpose of cleaning or repairs. A

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

l. In a boiler, the combination of a tubular shell, an annular capdetachably secured thereto, removable heads and dues, a gasket, a ringengaging the gasket, and set-screws in the cap engaging ltheV ring,substantially as described.

2. In a boiler, the combination of a plain tubular shell externallythreaded at each end, annular internally-threaded caps having largecentral openings, set-screws at regular intervals in the caps, removableheads in the boiler, iiues connecting the heads and attached thereto, agasket covering the seam between the heads and shell, rings engaging thegasket and engaged by the set-screws, substantially as described.

3. The combination of a tubular shell, annular caps detachably securedthereto, setscrews at intervals in the caps, removable heads within theshell, ues connecting the heads and attached thereto, the `outer iuesbeing arranged in a circle and equidistant from the peripheries of theheads, gaskets covering the seam between theheads and shell, and ringsengaging the gaskets and engaged by the set-screws, substantially asdescribed.

4. In a boiler, the combination of a plain tubular shell externallythreaded at the ends, internally-threaded caps having large centralopenings, set-screws at regular intervals in the caps, removable headsin the shell, flues connecting the heads, and arranged in a circleequidistant from the peripheries of the heads, gaskets covering theseams between the heads and shell, and yielding rings engagin g thegaskets and engaged by the screws, substantially as described.

In testimony whereof I alx my signature in presence of two witnesses.

CHARLES OLSON.

Witnesses:

LUTHER V. MoULToN, IDA THInBoU'r.

IOO

